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-/* -*- C++ -*- */
-// $Id$
-
-// ============================================================================
-//
-// = LIBRARY
-// ace
-//
-// = FILENAME
-// Dirent.h
-//
-// = DESCRIPTION
-// Define a portable directory-entry manipulation interface.
-//
-// = AUTHOR
-// Douglas C. Schmidt <schmidt@cs.wustl.edu>
-//
-// ============================================================================
-
-#if !defined (ACE_DIRENT_H)
-#define ACE_DIRENT_H
-
-#include "ace/OS.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-#pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-class ACE_Dirent
-{
- // = TITLE
- // Define a portable UNIX directory-entry iterator.
-public:
- // = Initialization and termination methods.
- ACE_Dirent (void);
- // Default constructor.
-
- ACE_Dirent (const char *dirname);
- // Constructor calls <opendir>
-
- int open (const char *filename);
- // Opens the directory named by filename and associates a directory
- // stream with it.
-
- ~ACE_Dirent (void);
- // Destructor calls <closedir>.
-
- void close (void);
- // Closes the directory stream and frees the DIR structure.
-
- // = Iterator methods.
- dirent *read (void);
- // Returns a pointer to a structure representing the directory entry
- // at the current position in the directory stream to which dirp
- // refers, and positions the directory stream at the next entry,
- // except on read-only filesystems. It returns a NULL pointer upon
- // reaching the end of the directory stream, or upon detecting an
- // invalid location in the directory. <readdir> shall not return
- // directory entries containing empty names. It is unspecified
- // whether entries are returned for dot or dot-dot. The pointer
- // returned by <readdir> points to data that may be overwritten by
- // another call to <readdir> on the same directory stream. This
- // data shall not be overwritten by another call to readdir() on a
- // different directory stream. <readdir> may buffer several
- // directory entries per actual read operation; <readdir> marks for
- // update the st_atime field of the directory each time the
- // directory is actually read.
-
- int read (struct dirent *entry,
- struct dirent **result);
- // Has the equivalent functionality as <readdir> except that an
- // <entry> and <result> buffer must be supplied by the caller to
- // store the result.
-
- // = Manipulators.
- long tell (void);
- // Returns the current location associated with the directory
- // stream.
-
- void seek (long loc);
- // Sets the position of the next <readdir> operation on the
- // directory stream. The new position reverts to the position
- // associated with the directory stream at the time the <telldir>
- // operation that provides loc was performed. Values returned by
- // <telldir> are good only for the lifetime of the DIR pointer from
- // which they are derived. If the directory is closed and then
- // reopened, the <telldir> value may be invalidated due to
- // undetected directory compaction. It is safe to use a previous
- // <telldir> value immediately after a call to <opendir> and before
- // any calls to readdir.
-
- void rewind (void);
- // Resets the position of the directory stream to the beginning of
- // the directory. It also causes the directory stream to refer to
- // the current state of the corresponding directory, as a call to
- // <opendir> would.
-
-private:
- DIR *dirp_;
- // Pointer to the directory stream.
-};
-
-#if !defined (ACE_LACKS_INLINE_FUNCTIONS)
-#include "ace/Dirent.i"
-#endif /* ACE_LACKS_INLINE_FUNCTIONS */
-
-#endif /* ACE_DIRENT_H */